package com.taozi.taopicturebackend.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import cn.hutool.core.util.ObjUtil;
import cn.hutool.core.util.StrUtil;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.taozi.taopicturebackend.constant.UserConstant;
import com.taozi.taopicturebackend.exception.BusinessException;
import com.taozi.taopicturebackend.exception.ErrorCode;
import com.taozi.taopicturebackend.manager.auth.StpKit;
import com.taozi.taopicturebackend.mapper.UserMapper;
import com.taozi.taopicturebackend.model.dto.user.UserQueryRequest;
import com.taozi.taopicturebackend.model.entity.User;
import com.taozi.taopicturebackend.model.enums.UserRoleEnum;
import com.taozi.taopicturebackend.model.vo.LoginUserVO;
import com.taozi.taopicturebackend.model.vo.UserVO;
import com.taozi.taopicturebackend.service.UserService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;


/**
 * @author admin
 * @description 针对表【user(用户)】的数据库操作Service实现
 * @createDate 2025-02-08 20:04:47
 */
@Service
@Slf4j
public class UserServiceImpl extends ServiceImpl<UserMapper, User>
        implements UserService {

    /**
     * 用户注册
     *
     * @param userAccount   用户账户
     * @param userPassword  用户密码
     * @param checkPassword 校验密码
     * @return
     */
    @Override
    public long userRegister(String userAccount, String userPassword, String checkPassword) {
        // 1. 校验参数
        if (StrUtil.hasBlank(userAccount, userPassword, checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账户过短");
        }
        if (userPassword.length() < 8 || checkPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码过短");
        }
        if (!userPassword.equals(checkPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "两次输入的密码不一致");
        }

        //2.检查用户账号是否和数据库中已有的重复
        QueryWrapper<User> userQueryWrapper = new QueryWrapper<>();
        userQueryWrapper.eq("userAccount", userAccount);
        long count = this.baseMapper.selectCount(userQueryWrapper);
        if (count > 0) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "账户已经注册");
        }
        //3.密码一定要加密
        String encryptPassword = getEncryptPassword(userPassword);
        //4，插入数据到教据库中
        User user = new User();
        user.setUserAccount(userAccount);
        user.setUserPassword(encryptPassword);
        user.setUserName("无名");
        user.setUserRole(UserRoleEnum.USER.getValue());
        boolean saveResult = this.save(user);
        if (!saveResult) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR, "注册失败，数据库错误");
        }
        return user.getId();
    }

    /**
     * 用户登录
     *
     * @param userAccount  用户账户
     * @param userPassword 用户密码
     * @param request      请求
     * @return 登录用户
     */
    @Override
    public LoginUserVO userLogin(String userAccount, String userPassword, HttpServletRequest request) {
        // 1. 校验
        if (StrUtil.hasBlank(userAccount, userPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userAccount.length() < 4) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户账户错误");
        }
        if (userPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户密码错误");
        }
        // 2. 加密
        String encryptPassword = getEncryptPassword(userPassword);
        // 3. 查询数据库
        QueryWrapper<User> userQueryWrapper = new QueryWrapper<>();
        userQueryWrapper.eq("userAccount", userAccount)
                .eq("userPassword", encryptPassword);
        User user = this.baseMapper.selectOne(userQueryWrapper);
        // 3.1 查不到 抛异常
        if (user == null) {
            log.info("user login failed, userAccount cannot match userPassword");
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户不存在或密码错误");
        }
        // 4. 记录用户的登录态  可删除 新增了sa-token 进行管理
        request.getSession().setAttribute(UserConstant.USER_LOGIN_STATE, user);
        // 5. 记录用户登录态到 Sa-token，便于空间鉴权时使用，注意保证该用户信息与 SpringSession 中的信息过期时间一致
        //检查此账号是否之前已有登录；
        //为账号生成 Token 凭证与 Session 会话；
        //记录 Token 活跃时间；
        //通知全局侦听器，xx 账号登录成功；
        //将 Token 注入到请求上下文；
        StpKit.SPACE.login(user.getId());
        StpKit.SPACE.getSession().set(UserConstant.USER_LOGIN_STATE, user);
        return this.getLoginUserVO(user);
    }

    /**
     * 修改密码
     * @param id
     * @param userOldPassword
     * @param userNewPassword
     * @param request
     * @return
     */
    @Override
    public Boolean userUpdatePwd(Long id,String userOldPassword, String userNewPassword,HttpServletRequest request) {
        // 1. 校验参数
        if(id == null || id <= 0){
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数错误");
        }
        if (StrUtil.hasBlank(userOldPassword, userNewPassword)) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "参数为空");
        }
        if (userOldPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户原密码长度过短");
        }
        if (userNewPassword.length() < 8) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "用户新密码长度过短");
        }
        // 2. 获取旧密码进行校验
        String encryptPassword = getEncryptPassword(userOldPassword);
        User loginUser = getLoginUser(request);
        if(!loginUser.getUserPassword().equals(encryptPassword)){
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "旧密码错误");
        }
        // 3. 加密新密码 并存入数据库
        String encryptNewPassword = getEncryptPassword(userNewPassword);
        //4，插入数据到教据库中
        User user = BeanUtil.copyProperties(loginUser, User.class);
        user.setUserPassword(encryptNewPassword);
        boolean updateResult = this.updateById(user);
        if (!updateResult) {
            throw new BusinessException(ErrorCode.SYSTEM_ERROR, "修改失败，数据库错误");
        }
        // 4. 移除登录态
        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    /**
     * 获取加密后的密码
     *
     * @param userPassword
     * @return
     */
    @Override
    public String getEncryptPassword(String userPassword) {
        // 盐值，混淆密码
        final String SALT = "taozi";
        return DigestUtils.md5DigestAsHex((SALT + userPassword).getBytes());
    }

    /**
     * 获取脱敏后的登录用户信息
     *
     * @param user 用户
     * @return 获取脱敏后的登录用户信息
     */
    @Override
    public LoginUserVO getLoginUserVO(User user) {
        if (user == null) {
            return null;
        }
        LoginUserVO loginUserVO = new LoginUserVO();
        BeanUtil.copyProperties(user, loginUserVO);  //  将user对象的值复制给loginUserVO
        return loginUserVO;
    }

    /**
     * 获取脱敏后的用户信息
     *
     * @param user 用户
     * @return 脱敏后的用户信息
     */
    @Override
    public UserVO getUserVO(User user) {
        if (user == null) {
            return null;
        }
        UserVO UserVO = new UserVO();
        BeanUtil.copyProperties(user, UserVO);  //  将user对象的值复制给UserVO
        return UserVO;
    }

    /**
     * 获取脱敏后的用户信息列表
     *
     * @param userList 用户列表
     * @return 脱敏后的用户信息列表
     */
    @Override
    public List<UserVO> getUserVOList(List<User> userList) {
        if (CollUtil.isEmpty(userList)) {
            return new ArrayList<>();
        }
        return userList.stream()
                .map(user -> getUserVO(user))
                .collect(Collectors.toList());
    }

    /**
     * @param request
     * @return
     */
    @Override
    public User getLoginUser(HttpServletRequest request) {
        // 判断是否登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        User currentUser = (User) userObj;
        if (currentUser == null || currentUser.getId() == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        // 从数据库中查询(追求性能的话可以注释，自接返回上述结果)
        Long userId = currentUser.getId();
        currentUser = this.getById(userId);
        if (currentUser == null) {
            throw new BusinessException(ErrorCode.NOT_LOGIN_ERROR);
        }
        return currentUser;
    }

    /**
     * 用户退出登录
     *
     * @param request
     * @return
     */
    @Override
    public boolean userLogout(HttpServletRequest request) {
        // 判断是否已经登录
        Object userObj = request.getSession().getAttribute(UserConstant.USER_LOGIN_STATE);
        if (userObj == null) {
            throw new BusinessException(ErrorCode.OPERATION_ERROR, "未登录");
        }
        // 移除登录态
        request.getSession().removeAttribute(UserConstant.USER_LOGIN_STATE);
        return true;
    }

    /**
     * 获取查询条件
     *
     * @param userQueryRequest
     * @return
     */
    @Override
    public QueryWrapper<User> getQueryWrapper(UserQueryRequest userQueryRequest) {
        if (userQueryRequest == null) {
            throw new BusinessException(ErrorCode.PARAMS_ERROR, "请求参数为空");
        }
        Long id = userQueryRequest.getId();
        String userName = userQueryRequest.getUserName();
        String userAccount = userQueryRequest.getUserAccount();
        String userProfile = userQueryRequest.getUserProfile();
        String userRole = userQueryRequest.getUserRole();
        String sortField = userQueryRequest.getSortField();
        String sortOrder = userQueryRequest.getSortOrder();

        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        queryWrapper.eq(ObjUtil.isNotNull(id), "id", id);
        queryWrapper.eq(StrUtil.isNotBlank(userRole), "userRole", userRole);
        queryWrapper.like(StrUtil.isNotBlank(userAccount), "userAccount", userAccount);
        queryWrapper.like(StrUtil.isNotBlank(userName), "userName", userName);
        queryWrapper.like(StrUtil.isNotBlank(userProfile), "userProfile", userProfile);
        queryWrapper.orderBy(StrUtil.isNotEmpty(sortField), sortOrder.equals("ascend"), sortField);
        return queryWrapper;
    }

    /**
     * 是否为管理员
     *
     * @param user
     * @return
     */
    @Override
    public boolean isAdmin(User user) {
        return user != null && UserRoleEnum.ADMIN.getValue().equals(user.getUserRole());
    }


}



